After attending the Gymnasium in Glückstadt, Blunck studied law and the Chinese language in Berlin. In 1894, he started working as a public servant in Hamburg. After being awarded a Dr.jur. in Jena in 1898, he began working as a lawyer in Hamburg. From 1904 to 1918, Blunck was a member of the Hamburg Bürgerschaft (the local parliament) for a rural area.